單項(xiàng)選擇題

The purpose of storm oil in a sea anchor is to（）.

A.weigh down the anchor
B.lubricate the anchor
C.repel dangerous fish
D.smooth the sea

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單項(xiàng)選擇題

The process of waiting a period of time before pretensioning an anchor is known as（）.

A.soaking
B.settling
C.sinking
D.bedding in

單項(xiàng)選擇題

The most probable position of the object of a search at any given time is the（）.

A.datum
B.estimated position
C.search point
D.initial point